Yeah, but it could sell better in one of those 'quiet' weeks. I can't fathom why publishers do this. They think people buy games in specific months only?!
A mix of both. Epic Games Store lacks many basic features that Steam has like Chat, Friends' list, Community Forums, Cloud Save, Workshop, Family&Friends Sharing, etc. besides the inconvenience of dividing games across many launchers. It's also tied to the Chinese government (through Chinese Telecommunications giant, Tencent), gets a lot of reports about account hacking/malicious mails, and scoops your data without your consent and share it with third-party corporations. All that ...
"As a customer, I’m happy to shop in different stores - already do! I’ve bought games from Xbox, Playstation, Switch, Steam, Origin, GOG, Humble, Uplay, Epic and other stores. To me, exclusives are fine when they come w/ advantages and when they are short – say, six months :)" - Randy Pitchford commenting on the 'rumors' yesterday on Twitter, if anyone's surprised.
The game is developed using Unreal Engine 4, so it's a no-brainer to release on Epic Games Store. Heck, Epic doesn't even need to fork cash for that one. (35% Steam+Epic's Royalty vs. 12% EGS.)